175Z7284 by Danfoss

The 175Z7284 is an AC variable-frequency drive manufactured by Danfoss for the VLT 6000 HVAC Drives series. As an HVAC drive, it regulates induction-motor speed so air handlers, pumps, and exhaust fans deliver only the airflow or pressure demanded by the building automation system. This helps reduce energy use and mechanical stress during daily operation. It is intended for variable-speed motor control in ventilation and pumping systems where load demand changes throughout the day. The unit is suited to indoor plant equipment that benefits from adjustable motor speed.

The drive operates from a three-phase input of 380-460 VAC, covering common service voltages in commercial facilities. It supplies up to 4.0 kW or 5.0 HP of mechanical output, which suits midsize blower wheels and condenser pumps. A compact NEMA 1 enclosure allows cabinet mounting in conditioned indoor areas while maintaining finger-safe protection. Integrated EMC compliance is achieved through a Class A1 and B filter that suppresses conducted radio-frequency emissions. Operators configure setpoints and review diagnostics with the included local control panel (LCP). This layout supports everyday adjustment without requiring external accessories for basic operation.

The drive is supplied as a standard unit, which keeps the base configuration simple. The application identifier is Graham. The fieldbus slot has no communication options, so the drive relies on local control and hardwired signals instead of an added bus module. The power stage has no coating, which makes it better suited to clean indoor areas where moisture and chemical fumes are minimal. Standard PID, sleep, and cascade functions remain available for general HVAC duty. These functions support routine fan and pump control in building service equipment.